Reddit mentions of BAFX Products - 2 Gallon Chicken - Poultry - Fowl Watering Bucket & Lid w/ 4 Nipples

I think it is a viable plan and it sounds like you'll do just fine. I am probably different from many people on this sub as I don't spend much time with my chickens at all and they do just fine. My chickens are not pets - they exist to provide eggs. I treat them well and they have a good life but I do not go to the extent that some people do to protect, enrich, cool, or heat their flock. I have never had a sickness or problem other than losing a hen to predators every now and then, which is just a fact of life.

Four hens is extremely manageable. We set up a hanging feeder like this one and a hanging water bucket with nipples like this. The food is refilled about once a week with four hens and the water about twice depending on the size of the bucket. We give them kitchen scrap treats several times a week. Otherwise they are pretty self sufficient. They put themselves in and out of the coop each day, they manage their own needs with the resources they have. I feel like a lot of people don't give chickens enough credit. They know what to do. They've been doing it for tens of millions of years. It is actually cool to watch them do instinctually things that they have no way of knowing how to do.

The one thing I would say to you is not to mess around with ex battery hens. I haven't had them and I know nothing about them but it seems like they would require extra work and care and attention. It seems like you don't want to do that so if it were me I would just start with young yens of a breed that are strong layers like Rhode Island Reds - if you have those in what I am guessing is Australia. They will be less work and hassle which is what it seems you want. Good luck!